Dyna-glo parts. I have a natural gas wall mounted Dyna-glo heater about 5 years old . Model # is

Question

I have a natural gas wall mounted Dyna-glo heater about 5 years old . Model # is RMC-40NGT.... I am trying to find a source for replacement parts as i believe that the thermocouple has died. The pilot lights but goes out after releasing it .. Sometimes it will light but goes out a few seconds later, and a small "click is heard..

Dyna Glo RMI 80 NGT Pilot stays lit. Fires up runs shuts off but will not relight unless you turn up stat. but the pilot does stay lit.